Muffler



Dec. 27, 1932. E, A, SAGU] 1,892,009

MUFFLER Filed Nov.l4, 1930 2 Sheefs-Sheet l I gave? oz e g Guam; 4

W yw- Dec. 27,' 1932. E. A. SAGUI 1,892,009

MUFFLER Filed Nov.l4, 1930 2 Sheets-Sheet 2 $3 EMMA W13 Patented Dec. '27, 1932 UNITED STATES PATENT OFFICE I EDWARD A. SAG-U1, OI LYNDiEUB-ST, NEW JERSEY MUFFLER Application fled November 14, 1930. Serial No. 495,586.

structed to positively force the gases :from' the exhaust pipe and mufller by reason of the acceleration and dilution caused by the an and at the same time-prevent the exhaust gases from initiating any reverse flow of air to allow the gases to stall the air or escape 1nto the air pipe.

The invention is illustrated in the accompanying drawings in which Figure 1 is an end view of a muffler embodying my invention. Figure 2 is a vertical section of the mufller, on line 2-2 in Figure 1, with the parts slightly separated. Figure 3 is a section on line 3-3 in Figure 1. Figure 4 is a section of a modified form of muflier with the air tube extended to receive a blast from the fan on the motor, the air tube being illustrated as shortened for the purpose of illustration.

The mufiier comprises a casing which has an inlet 11 for the exhaust gases, an inlet 12 for air and an open outlet 13 for the combined air and exhaust gases. The casing 10,

for convenience in manufacture and assembly, is preferably made of two members 14:

and 15 which latter member includes the air inlet pipe 12. The member 14 is secured in place on the member 15 by bolts 16. The two members are separated by a wall 17 which forms the top of the member 15 and the 3 member 15 has a partition 18 across its width.

The wall 17 and partition 18 define the top and bottom of air passage 19 in extension of the air pipe 12.

Extending across this air passage are nozzles or ducts 20. The ducts extend partly below the top edge of the partition and slightly into the inlet ends of the second set of nozzles 21 which extend from the partition 18 toward the outlet 13. The nozzles are preferably elongated in crosssection and having their lon est dimension extendingin the di rection o the flow of air in the chamber 19. In other words, at right angles to tlfe air inletpipe 12. The nozzles 20 are slightly smaller than the nozzles 21 where they overlap and this space is proportioned to allow the proper amount of air to pass into the outlet chamber 22 along with the exhaust gases. This mufiles the noise of the discharge, dilutes v the gases from the engine exhaust to which the pipe 11 is secured, and prevents any back draft or passage of the gases into the air inlet pipe 12.

In Figure 4 I illustrate a modified form ofmufiler in which the exhaust pipe 23 has the muffler attached thereto in an adjustable manner by means of the bolt 24 which bears on the pipe 23 and is secured in the flange-25. The flange 25 is part of the main mufiier casing 26. The outlet pipe 27 of the muffler receives the exhaust gases from the exhaust pipe 23. The exhaust pipe is provided with an extension 28. The mufiier has an air inlet pipe 29 which communicates with the outlet pipe 27 and conducts air around the extension 28 and then to the outlet 27. The clearance at 31 is adjusted to provide the proper velocity to the air passing the outlet of the extension 28. This adjustment is provided by the screw 24. If desired, the amount of air is increased by the air pipe extending to the front of the motor and arranged in the path of air coming from the cooling fan 30 usual at the front of engines. The extension 31 of the air inlet pipe is pro- 30 vided with a flared front end. The pipe 31 is shown shortened out of proportion to the rest of the device in the drawings.

' The adjustment of the air spaces between the outer ends of the nozzles 20 and the inner B5 ends of the nozzles 21 can be made, if necessary, by gaskets or shims interposed between the members 14 and 15.

Various changes can be made in the arrangements and shapes of the parts withoutdeparting from the scope of the invention.

1. A mufiler comprising a member having a cylindrical outlet portion and a top wall and. having a partition near and parallel to'- the said top wall and having an air inlet extending to one side of and parallel with the member and in direct communication with the space between the partition and the top wall, nozzles secured in the partition and" extending through the ma'or length of the outlet portion, and a second member secure on the top wall and having an inlet at its outer end, and mules secured to said second 5 member and extending part we into said first mentioned nozzles and spa therefrom to form an adequate passage for air.

2. A mufller comprisin a member ha a ng'lindrical outlet portion and a top w 10 an having a partition near and parallel to the said top wall and having an air inlet en tending to one side of and parallel with the member and in direct communication with the space between the partition and the top 15 wall, nozzles secured in the partition and extending through the major len h of the outlet portion, and a second mem r secured on the top wall and having an inlet at outer .end, and nozzles secured to said second member and extending part way into said first mentioned nozzles and spaced therefrom to form an adequate assage for air, said nozzles being elongate in cross section with their longest dimensions in the direction of the flow of 25 air between the top wall and the partition.

In testimony whereof he afiixes his signature.

EDWARD A. SAGUI. 

